This silent film shows some of the steps in assembling a pilot's flight helmet. It's believed that the film shows APH-6C Dual Visor Pilot Flight Helmet developed by Sierra Engineering Company, Sierra Madre, CA in the mid-to-late 1960s and sold through the late 1970s, Military Spec: MIL-H-22995A. Sierra got its start in the late 1940s and created a famous crash test dummy known as "Sierra Sam". By 1966 the company had over 300 employees.
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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com